[DH-5575] Add env var to change the container port (#423)

.env.example

@@ -43,3 +43,5 @@ MONGODB_DB_PASSWORD = 'admin'
 S3_AWS_ACCESS_KEY_ID=
 S3_AWS_SECRET_ACCESS_KEY=
 ONLY_STORE_CSV_FILES_LOCALLY = False # Set to True if only want to save generated CSV files locally instead of S3. Note that if stored locally they should be treated as ephemeral, i.e., they will disappear when the engine is restarted.
+
+CORE_PORT = 80 # This env var defines the port that will be exposed by the container. It serves as the configuration for both the internal and external container ports.

Dockerfile

@@ -10,6 +10,10 @@ RUN pip install --no-cache-dir --upgrade -r /app/requirements.txt
 
 COPY . /app
 
-EXPOSE 80
+# Set default CORE_PORT to 80 if not provided
+ARG CORE_PORT=80
+ENV CORE_PORT=${CORE_PORT}
 
-CMD ["uvicorn", "dataherald.app:app", "--host", "0.0.0.0", "--port", "80"]
+EXPOSE ${CORE_PORT}
+
+CMD ["uvicorn", "dataherald.app:app", "--host", "0.0.0.0", "--port", "${CORE_PORT}"]

docker-compose.yml

@@ -5,8 +5,10 @@ services:
       context: .
       dockerfile: Dockerfile
     ports:
-      - "80:80"
-    command: uvicorn dataherald.app:app --host 0.0.0.0 --port 80 --log-config log_config.yml --log-level debug --reload
+      - "${CORE_PORT:-80}:${CORE_PORT:-80}"
+    environment:
+      - CORE_PORT=${CORE_PORT:-80}
+    command: uvicorn dataherald.app:app --host 0.0.0.0 --port ${CORE_PORT:-80} --log-config log_config.yml --log-level debug --reload
     stdin_open: true
     tty: true
     volumes: