Add docker-compose to deployment

src/.gitignore

@@ -0,0 +1,2 @@
+.proc.env
+.staging.env

src/docker-compose.prod.yml

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+version: "3"
+
+services:
+  db:
+    build:
+      context: backend/db
+    ports:
+      - 27017:27017
+    environment:
+      MONGO_INITDB_ROOT_USERNAME: root
+      MONGO_INITDB_ROOT_PASSWORD: example
+
+  server:
+    build:
+      context: backend/server
+    ports:
+      - 5000:80
+    environment:
+      MONGODB__Username: root
+      MONGODB__Password: example
+      MONGODB__Host: db
+      MONGODB__Port: 27017
+      MONGODB__Database: todo
+    depends_on:
+      - db
+
+  client:
+    build:
+      context: client
+    ports:
+      - 3000:3000