[backend] add basic files for deploying and extending backend operations

.gitignore

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+**/*.env

backend/Dockerfile

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+FROM alpine:latest AS build
+
+RUN apk add python3
+RUN mkdir /venv /app
+RUN python3 -m venv /venv
+ENV PATH="/venv/bin:$PATH"
+
+RUN apk add build-base linux-headers musl-dev python3-dev libpq-dev
+RUN pip3 install flask uwsgi psycopg2
+
+
+
+#FROM alpine:latest AS prod
+
+#RUN apk add python3
+#ENV PATH="/venv/bin:$PATH"
+#COPY --from=build /venv /venv
+EXPOSE 9090/tcp
+
+ENTRYPOINT ["uwsgi", "--http", ":9090", "--callable", "app", "--wsgi-file", "/app/main.py"]

backend/docker-compose.yaml

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+services:
+  backend:
+    build: .
+    ports:
+      - "80:9090"
+    volumes:
+      - "./src/:/app:ro"
+    env_file: backend.env

backend/src/main.py

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+from flask import Flask
+import psycopg2 as psql
+from os import environ as env
+
+app = Flask(__name__)
+
+db_params = {
+    'database': env.get('DB_NAME'),
+    'user': env.get('DB_USER'),
+    'password': env.get('DB_PASS'),
+    'host': env.get('DB_HOST'),
+    'port': int(env.get('DB_PORT'))
+}
+
+db = psql.connect(**db_params)
+
+@app.route("/")
+def test():
+    c = db.cursor()
+    try:
+        c.execute('SELECT * FROM movies')
+    except Exception:
+        db.rollback()
+        return "Failed to fetch table 'movies'"
+
+    res = c.fetchmany(10)
+    c.close()
+    return "<p>Hello, World! test data:<br>" + "<br>".join(str(i) for i in res) + "</p>"