Add release versioning and Docker release workflow

app/__init__.py

@@ -1 +1,5 @@
 """Application package for the md-to-html service."""
+
+from app.version import __version__
+
+__all__ = ["__version__"]

app/api.py

@@ -10,6 +10,7 @@ from fastapi.responses import JSONResponse
 from pydantic import BaseModel, ConfigDict, field_validator
 
 from app.converter import convert, load_template_text
+from app.version import __version__
 
 DEFAULT_MAX_MARKDOWN_BYTES = 1_048_576
 DEFAULT_MAX_REQUEST_BYTES = 1_200_000
@@ -154,6 +155,11 @@ async def health() -> dict[str, str]:
     return {"status": "ok"}
 
 
+@app.get("/version")
+async def version() -> dict[str, str]:
+    return {"version": __version__}
+
+
 @app.get("/ready")
 async def ready() -> dict[str, Any]:
     details: dict[str, Any] = {"status": "ok", "template_loaded": True}

app/streamlit_app.py

@@ -10,9 +10,11 @@ import streamlit as st
 
 try:
     from app.converter import convert
+    from app.version import __version__
 except ModuleNotFoundError:
     sys.path.append(str(Path(__file__).resolve().parent.parent))
     from app.converter import convert
+    from app.version import __version__
 
 MAX_PREVIEW_STORE_ITEMS = 20
 
@@ -146,7 +148,9 @@ if "preview_url" not in st.session_state:
     st.session_state["preview_url"] = None
 
 st.title("Markdown → HTML")
-st.caption("Загрузите markdown-файл, проверьте превью и скачайте готовый HTML.")
+st.caption(
+    f"Версия {__version__}. Загрузите markdown-файл, проверьте превью и скачайте готовый HTML."
+)
 
 uploaded_file = st.file_uploader(
     "Загрузите .md файл",

app/version.py

@@ -0,0 +1,10 @@
+from pathlib import Path
+
+VERSION_FILE = Path(__file__).resolve().parent.parent / "VERSION"
+
+
+def read_version() -> str:
+    return VERSION_FILE.read_text(encoding="utf-8").strip()
+
+
+__version__ = read_version()