fix: dynamic version number fed into the swagger api from docker release

Dockerfile

@@ -1,5 +1,8 @@
 FROM debian:buster-20230227-slim AS cheminf-python-ms
 
+ARG RELEASE_VERSION
+ENV RELEASE_VERSION=${RELEASE_VERSION}
+
 # Install runtime dependencies
 RUN apt-get update \
  && apt-get upgrade -y \

app/main.py

@@ -5,6 +5,7 @@
 from .routers import converters, chem, compose, decimer
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.openapi.utils import get_openapi
+import os
 
 app = FastAPI()
 
@@ -34,7 +35,7 @@ def custom_openapi():
         return app.openapi_schema
     openapi_schema = get_openapi(
         title="Cheminf Micro Services",
-        version="0.3.0",
+        version = os.getenv("RELEASE_VERSION", "pre-release"),
         description="This set of essential and valuable microservices is designed to be accessed via API calls to support cheminformatics. Generally, it is designed to work with SMILES-based inputs and could be used to translate between different machine-readable representations, get Natural Product (NP) likeliness scores, visualize chemical structures, and generate descriptors. In addition, the microservices also host an instance of STOUT and another instance of DECIMER (two deep learning models for IUPAC name generation and optical chemical structure recognition, respectively).",
         routes=app.routes,
     )