fix: add --no-cache to deploy-now build step; revert temp cache bust changes

.gitea/workflows/deploy-now.yaml

@@ -94,7 +94,7 @@ jobs:
           printf 'fi\n' >> "$SCRIPT"
           printf '\n' >> "$SCRIPT"
           printf 'echo "Deploying all services"\n' >> "$SCRIPT"
-          printf 'docker compose --env-file /tmp/nexus-deploy-env build\n' >> "$SCRIPT"
+          printf 'docker compose --env-file /tmp/nexus-deploy-env build --no-cache\n' >> "$SCRIPT"
           printf 'docker compose --env-file /tmp/nexus-deploy-env up -d --force-recreate\n' >> "$SCRIPT"
           printf '\n' >> "$SCRIPT"
           printf 'echo "Waiting for services to become healthy (up to 180s)..."\n' >> "$SCRIPT"

backend/Dockerfile

@@ -1,8 +1,6 @@
 FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS build
-ARG DEPLOY_TIMESTAMP
 WORKDIR /src
 COPY Nexus.Api.csproj .
-# cache-bust: 2026-06-22T19:56+02
 RUN dotnet restore
 COPY . .
 RUN dotnet publish -c Release -o /app/publish

compose.yaml

@@ -33,8 +33,6 @@ services:
   api:
     build:
       context: ./backend
-      args:
-        DEPLOY_TIMESTAMP: "20260622195600"
     restart: unless-stopped
     deploy:
       resources: