Add example docker-compose config file

docker-compose.yaml.example

@@ -0,0 +1,37 @@
+version: "2.0"
+
+services:
+    # HTTP server configured to listen on 127.0.0.1:8080
+    nginx:
+        build:
+            context: .
+        volumes_from:
+            - cms:ro
+        ports:
+            - 127.0.0.1:8080:80
+        depends_on:
+            - api
+            - cms
+
+    # API service with /data/quotes mounted as database storage
+    # SECRET_KEY is needed for API key validation
+    api:
+        build:
+            context: ./api
+        volumes:
+            - /data/quotes:/quotes
+        environment:
+            - SQLALCHEMY_DATABASE_URI=sqlite:////quotes/quotes.db
+            - SECRET_KEY=__SECRET_KEY__
+        expose:
+            - 5000
+
+    # CMS service with /data/grav mounted as user data storage
+    cms:
+        build:
+            context: ./cms
+        volumes:
+            - /data/grav:/app/user
+            - /app
+        expose:
+            - 9000