diff --git a/.github/workflows/build-dockerhub.yml b/.github/workflows/build-dockerhub.yml
index dd8896a..a9b918d 100644
--- a/.github/workflows/build-dockerhub.yml
+++ b/.github/workflows/build-dockerhub.yml
@@ -15,25 +15,29 @@ jobs:
     environment: PROD
 
     steps:
-      - name: Checkout the code
-        uses: actions/checkout@v1
+      - name: Checkout code
+        uses: actions/checkout@v4
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
+
+      - name: Cache Docker layers
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
 
       - name: Login to DockerHub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Print SSL Certificates
-        run: |
-          echo "CARGO_SERVER_SSL_CA: ${{ secrets.SERVER_SSL_CA }}"
-
       - name: Build and deploy images
         env:
           CARGO_SERVER_SSL_CA: ${{ secrets.SERVER_SSL_CA }}
diff --git a/Dockerfile b/Dockerfile
index aa4cb34..192bffe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,30 +5,45 @@ ARG CARGO_SERVER_SSL_CA
 ARG CARGO_SERVER_SSL_CERT
 ARG CARGO_SERVER_SSL_KEY
 
-# Decode the base64 encoded environment variables
-RUN export CARGO_SERVER_SSL_CA=$(echo "${CARGO_SERVER_SSL_CA}" | base64 -d)
-RUN export CARGO_SERVER_SSL_CERT=$(echo "${CARGO_SERVER_SSL_CERT}" | base64 -d)
-RUN export CARGO_SERVER_SSL_KEY=$(echo "${CARGO_SERVER_SSL_KEY}" | base64 -d)
-
-# Validate that the SSL environment variables are set
-RUN /bin/bash -c 'if [ -z "$CARGO_SERVER_SSL_CA" ]; then echo "Error: CARGO_SERVER_SSL_CA is not set"; exit 1; fi && \
-    if [ -z "$CARGO_SERVER_SSL_CERT" ]; then echo "Error: CARGO_SERVER_SSL_CERT is not set"; exit 1; fi && \
-    if [ -z "$CARGO_SERVER_SSL_KEY" ]; then echo "Error: CARGO_SERVER_SSL_KEY is not set"; exit 1; fi'
-
-RUN apt update
-RUN apt install -y protobuf-compiler libssl-dev gcc pkg-config build-essential cmake clang
-
+# Decode the base64 encoded environment variables and validate them
+RUN export CARGO_SERVER_SSL_CA=$(echo "${CARGO_SERVER_SSL_CA}" | base64 -d) &&
+  export CARGO_SERVER_SSL_CERT=$(echo "${CARGO_SERVER_SSL_CERT}" | base64 -d) &&
+  export CARGO_SERVER_SSL_KEY=$(echo "${CARGO_SERVER_SSL_KEY}" | base64 -d) &&
+  if [ -z "$CARGO_SERVER_SSL_CA" ]; then
+    echo "Error: CARGO_SERVER_SSL_CA is not set"
+    exit 1
+  fi &&
+  if [ -z "$CARGO_SERVER_SSL_CERT" ]; then
+    echo "Error: CARGO_SERVER_SSL_CERT is not set"
+    exit 1
+  fi &&
+  if [ -z "$CARGO_SERVER_SSL_KEY" ]; then
+    echo "Error: CARGO_SERVER_SSL_KEY is not set"
+    exit 1
+  fi
+
+# Install dependencies
+RUN apt update && apt install -y --no-install-recommends \
+  protobuf-compiler libssl-dev gcc pkg-config build-essential cmake musl-tools &&
+  rm -rf /var/lib/apt/lists/*
+
+# Install cross
+RUN cargo install cross
+
+# Set up the build environment
 RUN mkdir -p ${TAGOIO_SOURCE_FOLDER}
 WORKDIR ${TAGOIO_SOURCE_FOLDER}
 ADD . ${TAGOIO_SOURCE_FOLDER}
 
 RUN touch .env
 
-RUN cargo build --release
+# Build the project
+RUN cross build --release
 
 # Unset the SSL environment variables
 RUN unset CARGO_SERVER_SSL_CA CARGO_SERVER_SSL_CERT CARGO_SERVER_SSL_KEY
 
+# Install runtime dependencies
 FROM debian:bookworm-slim
 ARG TAGOIO_SOURCE_FOLDER="/tago-io"
 
diff --git a/README.md b/README.md
index f185cae..2e941a0 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,7 @@ Before you begin, ensure you have:
 
 1. **Create a Network in TagoIO**:
    - Navigate to Integrations in your TagoIO Profile and create a new Network.
+   - Enter the [Middleware Endpoint](#middleware-endpoint-optional) for your Relay (Optional, allows publishing from TagoIO to the Relay).
    - Enable Serial and write a Payload Parser:
      ```js
      if (Array.isArray(payload)) {
@@ -68,6 +69,7 @@ Before you begin, ensure you have:
        serial = payload_received?.metadata.topic.split("/").pop();
      }
      ```
+
 2. **Generate Network Token**: Generate and save the Network Token.
 3. **Create a Connector**: Create a Connector for your Network.
 4. **Generate Authorization**: Navigate to Devices > Authorizations in TagoIO and generate an authorization token.
@@ -128,29 +130,9 @@ tagoio-relay start [--verbose info,error,mqtt,network] [--config-path /path/to/c
 
 To configure the TagoIO MQTT Relay, you can either use environment variables or edit the `config.toml` file directly. Below are the available configuration parameters:
 
-### Environment Variables
-
-```sh
-export TAGOIO__RELAY__NETWORK_TOKEN="Your-Network-Token"
-export TAGOIO__RELAY__AUTHORIZATION_TOKEN="Your-Authorization-Token"
-export TAGOIO__RELAY__TAGOIO_URL="https://api.tago.io"
-export TAGOIO__RELAY__DOWNLINK_PORT="3001"
-export TAGOIO__RELAY__MQTT__CLIENT_ID="tagoio-relay"
-export TAGOIO__RELAY__MQTT__TLS_ENABLED="false"
-export TAGOIO__RELAY__MQTT__ADDRESS="localhost"
-export TAGOIO__RELAY__MQTT__PORT="1883"
-export TAGOIO__RELAY__MQTT__SUBSCRIBE="/tago/# /topic/+"
-export TAGOIO__RELAY__MQTT__USERNAME="my-username"
-export TAGOIO__RELAY__MQTT__PASSWORD="my-password"
-export TAGOIO__RELAY__MQTT__BROKER_TLS_CA=""
-export TAGOIO__RELAY__MQTT__BROKER_TLS_CERT=""
-export TAGOIO__RELAY__MQTT__BROKER_TLS_KEY=""
-export TAGOIO__RELAY__CONFIG_PATH="./.config/.tagoio-mqtt-relay.toml"
-```
-
 ### `.tagoio-mqtt-relay.toml`
 
-The `.tagoio-mqtt-relay.toml` file contains the Relay parameters. Here is a reference:
+The `.tagoio-mqtt-relay.toml` file generated by the `init` command contains the Relay parameters. Here is a reference:
 
 ```toml
 [relay]
@@ -175,6 +157,52 @@ password="my-password"
 # broker_tls_cert=""
 # broker_tls_key=""
 ```
+### Environment Variables
+
+```sh
+export TAGOIO__RELAY__NETWORK_TOKEN="Your-Network-Token"
+export TAGOIO__RELAY__AUTHORIZATION_TOKEN="Your-Authorization-Token"
+export TAGOIO__RELAY__TAGOIO_URL="https://api.tago.io"
+export TAGOIO__RELAY__DOWNLINK_PORT="3001"
+export TAGOIO__RELAY__MQTT__CLIENT_ID="tagoio-relay"
+export TAGOIO__RELAY__MQTT__TLS_ENABLED="false"
+export TAGOIO__RELAY__MQTT__ADDRESS="localhost"
+export TAGOIO__RELAY__MQTT__PORT="1883"
+export TAGOIO__RELAY__MQTT__SUBSCRIBE="/tago/# /topic/+"
+export TAGOIO__RELAY__MQTT__USERNAME="my-username"
+export TAGOIO__RELAY__MQTT__PASSWORD="my-password"
+export TAGOIO__RELAY__MQTT__BROKER_TLS_CA=""
+export TAGOIO__RELAY__MQTT__BROKER_TLS_CERT=""
+export TAGOIO__RELAY__MQTT__BROKER_TLS_KEY=""
+export TAGOIO__RELAY__CONFIG_PATH="./.config/.tagoio-mqtt-relay.toml"
+```
+
+### Middleware Endpoint (Optional)
+The Middleware Endpoint allows the TagoIO MQTT Relay to receive messages from TagoIO through a secure TLS connection. This feature is optional but can be very useful for advanced integrations.
+
+The Relay comes with pre-set TLS certificates configured during build time, so you don't need to set them up manually.
+
+#### Setting Up the Middleware Endpoint
+
+1. **Public HTTPs Endpoint:**:
+   Ensure that you have a public HTTPs endpoint that TagoiO can reach.
+2. **Configure the Downlink Port:**
+  The default port for the Middleware Endpoint is 3001, but you can change this by setting the downlink_port in your (configuration file)[#configuration-file-and-environment-variables].
+Repl
+3. **Local Testing**:
+  For local testing, you can use tools like ngrok or tailscale to expose your local server to the internet securely.
+
+  **Using Ngrok:**
+  ```bash
+  ngrok tcp 3001
+  ```
+
+  **Using Tailscale:**
+  ```bash
+  ngrok funnel 3001
+  ```
+4. **Network Middleware Endpoint:**
+   To enable the Middleware Endpoint, you need to set the field `Middleware Endpoint` in your Network at TagoIO to the generated URL (e.g., https://abcd1234.ngrok.io) as your Middleware Endpoint in TagoIO.
 
 ## License
 
diff --git a/src/services/mqttrelay.rs b/src/services/mqttrelay.rs
index 19da723..de6cd00 100644
--- a/src/services/mqttrelay.rs
+++ b/src/services/mqttrelay.rs
@@ -55,7 +55,7 @@ pub async fn run_mqtt_relay_connection(relay_cfg: Arc<RelayConfig>, publish_rx:
       return;
     }
     let backoff_duration = calculate_backoff(backoff_retry_attempts);
-    log::info!(target: "mqtt", "Retrying in {:?}", backoff_duration);
+    log::warn!(target: "mqtt", "Disconnected from MQTT broker. Retrying in {:?}", backoff_duration);
     publish_task.abort();
     sleep(backoff_duration).await;
     backoff_retry_attempts += 1;