Add versioning support to Dockerfile and app footer (#35)

- Update Dockerfile to set APP_VERSION from build environment
- Modify app.py to display the current version in the footer
- Implement a check for tag presence in the build workflow

Author: alexdioso

.github/workflows/build_and_push_image.yaml

@@ -25,6 +25,13 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+
+      - name: Ensure tag present and set APP_VERSION
+        run: |
+          if [[ "${GITHUB_REF}" != refs/tags/* ]]; then
+            echo "No tag found; failing build." && exit 1
+          fi
+          echo "APP_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
       
       - name: Log in to the Container registry
         uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
@@ -55,6 +62,8 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            APP_VERSION=${{ env.APP_VERSION }}
 
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v2

Dockerfile

@@ -5,6 +5,8 @@ LABEL org.opencontainers.image.source="https://github.com/SASlabgroup/microSWIFT
 
 # Set the working directory in the container
 WORKDIR /app
+ARG APP_VERSION=DEV
+ENV APP_VERSION=${APP_VERSION}
 
 # Copy the current directory contents into the container at /app
 COPY . /app

app.py

@@ -1,3 +1,5 @@
+import os
+
 from dash import Dash, html, dcc, callback, Output, Input, no_update, ALL
 import dash_bootstrap_components as dbc
 
@@ -24,6 +26,7 @@
 app.title = "Dashboard"
 
 server = app.server
+APP_VERSION = os.getenv("APP_VERSION", "DEV")
 
 # Set the default mission to the first mission in the list.
 all_missions = get_missions()
@@ -52,7 +55,7 @@
                             html.Br(),
                             html.Hr(),
                             dbc.Card(id="latest_info", body=True),
-                            html.Footer("Version 0.8"),
+                            html.Footer(f"Version {APP_VERSION}"),
                         ]
                     ),
                     width=3,