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/configs/api.yaml.jinja

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+app:
+  host: 0.0.0.0
+  port: 8080
+  debug: true
+  cors:
+    allow_origins: ["*"]
+    allow_methods: ["*"]
+    allow_headers: ["*"]
+    allow_credentials: True
+db:
+  master:
+    host: {{project_slug}}_db
+    port: 5432
+    database: {{project_slug}}_db
+    user: postgres
+    password: postgres
+    pool_size: 2
+logging:
+  level: INFO
+observability:
+  prometheus:
+    host: 0.0.0.0
+    port: 9090
+    urls_mapping:
+      /api/debug/.*: /api/debug/*
+  jaeger:
+    endpoint: http://otel:4318/v1/traces

deploy/configs/otel.yaml.jinja

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+receivers:
+  otlp:
+    protocols:
+      grpc:
+        endpoint: 0.0.0.0:4317
+      http:
+        endpoint: 0.0.0.0:4318
+
+exporters:
+  otlp/jaeger:
+    endpoint: "http://jaeger:4317"
+    tls:
+      insecure: true
+  debug:
+    verbosity: detailed
+
+processors:
+  batch:
+
+service:
+  pipelines:
+    traces:
+      receivers: [otlp]
+      exporters: [debug, otlp/jaeger]
+    metrics:
+      receivers: [otlp]
+      exporters: [debug]
+    logs:
+      receivers: [otlp]
+      exporters: [debug]

deploy/configs/prometheus.yml.jinja

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+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+
+scrape_configs:
+  - job_name: prometheus
+    static_configs:
+      - targets:
+        - "localhost:9090"
+  - job_name: {{project_name}}
+    static_configs:
+      - targets:
+        - "{{project_name}}:9090"