Initial commit

This is a FastAPI backend microservice template used with `copier` utility.

Features of applied template are:
- Configuration file processing logic
- Metrics and tracing (both optional) configuration available
- Debug endpoints
- Database migration commands, prepared Alembic environment
- Database usage example in ping_db endpoint
- gitea sanity check pipeline

deploy/README.md

@@ -0,0 +1,21 @@
+# deploy example
+
+This is a complete deployment example with following services:
+
+- `postgres` database (with initialization and rootless user):
+    - 5432 port exposure commented
+- `api` (with data migrations) with 8080 port exposure:
+    - configured by [configs/api.yaml](./configs/api.yaml)
+    - exposes 8080 port
+    - 9090 metrics port not exposed
+- `prometheus` to collect metrics
+    - configured by [configs/prometheus.yaml](./configs/prometheus.yaml)
+    - exposes 9090 port with prometheus UI (optional)
+- `grafana` as a powerful UI for metrics visualization
+    - exposes 3000 port, default user:password is `admin`:`admin`
+    - prometheus metrics are available at `http://prometheus:9090`
+- `jaeger` to collect and show traces
+    - exposes UI at port 16686
+- `otel` (OpenTELemetry) agent working as proxy for jaeger
+    - configured by [configs/otel.yaml](./configs/otel.yaml)
+    - does not expose 4317/4318 ports as containers use it inside the internal network