fix(build): update datetime and fix build (#490)

Signed-off-by: Goetz Goerisch <g.goerisch@vdw.de>

Author: GoetzGoerisch

.forgejo/workflows/build_containers.yml

@@ -45,7 +45,6 @@ jobs:
             type=ref,event=branch
             type=ref,event=tag
             type=ref,event=pr
-            type=sha,prefix=sha-,format=short
       - name: Build and push
         uses: docker/build-push-action@v6.18.0
         with:

Dockerfile

@@ -2,7 +2,8 @@ FROM python:3.13-trixie
 LABEL org.opencontainers.image.source=https://github.com/umati/Sample-Server-asyncio
 
 RUN apt update && \
-    apt install -yy build-essential \
+    apt install -yy --no-install-recommends --no-install-suggests \
+    build-essential \
     python3-dev \
     libssl-dev \
     libffi-dev \

src/server.py

@@ -14,7 +14,7 @@
 import logging
 import time
 import random
-from datetime import datetime
+from datetime import datetime, timezone
 from asyncua import Server, ua
 from asyncua.common.ua_utils import value_to_datavalue
 from asyncua.common.instantiate_util import instantiate
@@ -174,7 +174,7 @@ async def main():
                             Value=dv.Value,
                             StatusCode_=dv.StatusCode_,
                             SourceTimestamp=dv.SourceTimestamp,
-                            ServerTimestamp=datetime.now(datetime.UTC)
+                            ServerTimestamp=datetime.now(timezone.utc)
                         )
                         await server.write_attribute_value(item[0][0].nodeid, new_dv, ua.AttributeIds.Value)