build(datacopy): add Dockerfile, compose and env template

Adds a self-contained way to run the SqlServer to Postgres copy anywhere: a multi-stage Dockerfile (net9.0 SDK build, ASP.NET runtime because the project references Microsoft.AspNetCore.App), a compose file that joins the shared greenNetwork so the target is reachable as postgres, an env template for the two connection strings, and a src/.dockerignore so the build context excludes node_modules and bin/obj.

The image restores explicitly from NuGet.org because the repo's nuget.config declares an empty packageSources, which would leave a clean container with no feed at all.

src/.dockerignore

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+# Applies to builds whose context is this folder (src/) — currently the DataCopy image.
+# Build output and local-only folders, so the context stays small and never poisons a build.
+**/bin
+**/obj
+**/node_modules
+**/dist
+.vs
+**/.git
+debug.log

src/GreenHome.DataCopy/.gitignore

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+# real connection strings — never commit
+datacopy.env

src/GreenHome.DataCopy/Dockerfile

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+# DataCopy — copies all data from SqlServer into the Postgres target.
+# The build context is the repo's src/ folder; see docker-compose.yml next to this file.
+
+FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
+WORKDIR /src
+
+# Only the project files first, so a source-only change reuses the restore layer.
+# NOTE: the repo's nuget.config declares an empty <packageSources/>, which would leave a
+# clean container with no feed at all. It is therefore deliberately not copied before
+# restore, so packages come from the default NuGet.org feed.
+COPY GreenHome.DataCopy/GreenHome.DataCopy.csproj GreenHome.DataCopy/
+COPY GreenHome.Infrastructure/GreenHome.Infrastructure.csproj GreenHome.Infrastructure/
+COPY GreenHome.Application/GreenHome.Application.csproj GreenHome.Application/
+COPY GreenHome.Domain/GreenHome.Domain.csproj GreenHome.Domain/
+COPY GreenHome.Sms.Ippanel/GreenHome.Sms.Ippanel.csproj GreenHome.Sms.Ippanel/
+COPY GreenHome.VoiceCall.Avanak/GreenHome.VoiceCall.Avanak.csproj GreenHome.VoiceCall.Avanak/
+COPY GreenHome.AI.DeepSeek/GreenHome.AI.DeepSeek.csproj GreenHome.AI.DeepSeek/
+RUN dotnet restore GreenHome.DataCopy/GreenHome.DataCopy.csproj \
+    --source https://api.nuget.org/v3/index.json
+
+COPY . .
+RUN dotnet publish GreenHome.DataCopy/GreenHome.DataCopy.csproj -c Release -o /app --no-restore
+
+# Infrastructure references Microsoft.AspNetCore.App, so the ASP.NET runtime is required.
+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS runtime
+WORKDIR /app
+COPY --from=build /app .
+
+# Extra arguments are appended, e.g. `docker compose run --rm datacopy --reset`.
+ENTRYPOINT ["dotnet", "GreenHome.DataCopy.dll"]

src/GreenHome.DataCopy/datacopy.env.example

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+# Copy to datacopy.env and fill in. datacopy.env is gitignored — never commit real credentials.
+# Values are taken literally: if a password contains '#' or starts/ends with a space, wrap the
+# whole value in double quotes.
+
+# SqlServer source (read-only). Use host.docker.internal when SqlServer runs on the Docker host.
+ConnectionStrings__SqlServer=Server=host.docker.internal,1433;Database=GreenHomeDb;User Id=sa;Password=CHANGE_ME;TrustServerCertificate=True;Encrypt=False
+
+# Postgres target — the infra container's database.
+ConnectionStrings__Postgres=Host=postgres;Port=5432;Database=greenhome;Username=greenhome;Password=CHANGE_ME

src/GreenHome.DataCopy/docker-compose.yml

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+# DataCopy — copies data from SqlServer into the Postgres target.
+#
+#   cp datacopy.env.example datacopy.env    # fill in both connection strings
+#   docker compose build
+#   docker compose run --rm datacopy        # copies only missing rows (resumable)
+#   docker compose run --rm datacopy --reset # wipes the target tables first, then copies
+#
+# Run it from this folder. The target is the shared infra Postgres, reached by the
+# name "postgres" over the external greenNetwork (see infra/docker-compose.yml).
+# The tool ends with a per-table row-count check and exits 1 on any mismatch.
+
+services:
+  datacopy:
+    image: greenhome-datacopy:latest
+    build:
+      context: ..
+      dockerfile: GreenHome.DataCopy/Dockerfile
+    env_file:
+      - datacopy.env
+    # lets the container reach a SqlServer that runs on the Docker host itself
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    networks:
+      - greenNetwork
+    # one-shot job: nothing to restart, and it must not be left running
+    restart: "no"
+
+networks:
+  greenNetwork:
+    external: true