chore: remove unused legacy Dockerfiles (#2314)

Fixes #2310. Partial follow-up to #1385 (PR-C).

Remove unused `Dockerfile.go` and `Dockerfile.node`, which describe
retired alternate builds. Current workflows, Makefile, Compose variants
and operator scripts already select the canonical `Dockerfile`.

Remove the obsolete formatter exclusions and label the old Node-to-Go
migration guide historical, linking current deployment instructions.
Historical release prose remains untouched. The canonical image, runtime
files, dependencies and Compose behavior are unchanged.

Validation: audited all 1,501 tracked files; old and new formatter
inputs are exactly the same 633 real Go files. Both formatter commands,
YAML/shell/workflow-reference checks, existing workflow/routing tests,
COPY gate and test inventory pass. All 218 standalone frontend suites
pass. The unchanged backend tree passed full server/ingestor suites, and
the unchanged app passed 12 browser smoke cases.

TDD exemption: behavior-preserving cleanup/refactor plus documentation;
no test files modified. `make` and `actionlint` were unavailable
locally; equivalent formatter and focused workflow checks ran directly.

[CI passed on this
head](https://github.com/Kpa-clawbot/CoreScope/actions/runs/40230911566),
including canonical container builds and all browser shards. Three
independent reviews passed. The published historical guide and its
current-deployment links render correctly in Chromium. No
settings/customizer changes.

.github/workflows/deploy.yml

@@ -172,9 +172,8 @@ jobs:
       - name: Enforce gofmt + go vet (issue #1859)
         run: |
           set -e
-          # gofmt: every tracked *.go file except the misnamed Dockerfile.go,
-          # which is a Dockerfile (FROM ...) that gofmt cannot parse.
-          unformatted=$(gofmt -l $(git ls-files '*.go' | grep -vi 'Dockerfile.go'))
+          # gofmt: every tracked *.go file.
+          unformatted=$(gofmt -l $(git ls-files '*.go'))
           if [ -n "$unformatted" ]; then
             echo "::error::gofmt required on these files:"
             echo "$unformatted"

Dockerfile.go

@@ -1,61 +0,0 @@
-FROM golang:1.27-alpine AS builder
-
-RUN apk add --no-cache build-base
-
-ARG APP_VERSION=unknown
-ARG GIT_COMMIT=unknown
-ARG BUILD_TIME=unknown
-
-# Build server
-WORKDIR /build/server
-COPY cmd/server/go.mod cmd/server/go.sum ./
-RUN go mod download
-COPY cmd/server/ ./
-RUN go build -ldflags "-X main.Version=${APP_VERSION} -X main.Commit=${GIT_COMMIT} -X main.BuildTime=${BUILD_TIME}" -o /corescope-server .
-
-# Build ingestor
-WORKDIR /build/ingestor
-COPY cmd/ingestor/go.mod cmd/ingestor/go.sum ./
-RUN go mod download
-COPY cmd/ingestor/ ./
-RUN go build -o /corescope-ingestor .
-
-# Runtime image
-FROM alpine:3.20
-
-RUN apk add --no-cache mosquitto mosquitto-clients supervisor caddy wget
-
-WORKDIR /app
-
-# Go binaries
-COPY --from=builder /corescope-server /corescope-ingestor /app/
-
-# Frontend assets + config
-COPY public/ ./public/
-COPY config.example.json channel-rainbow.json ./
-
-# Bake git commit SHA (CI writes .git-commit before build; fallback for non-ldflags usage)
-COPY .git-commi[t] ./
-RUN if [ ! -f .git-commit ]; then echo "unknown" > .git-commit; fi
-
-# Supervisor + Mosquitto + Caddy config
-COPY docker/supervisord-go.conf /etc/supervisor/conf.d/supervisord.conf
-COPY docker/supervisord-go-no-mosquitto.conf /etc/supervisor/conf.d/supervisord-no-mosquitto.conf
-COPY docker/supervisord-go-no-caddy.conf /etc/supervisor/conf.d/supervisord-no-caddy.conf
-COPY docker/supervisord-go-no-mosquitto-no-caddy.conf /etc/supervisor/conf.d/supervisord-no-mosquitto-no-caddy.conf
-COPY docker/mosquitto.conf /etc/mosquitto/mosquitto.conf
-COPY docker/Caddyfile /etc/caddy/Caddyfile
-
-# Data directory
-RUN mkdir -p /app/data /var/lib/mosquitto /data/caddy && \
-    chown -R mosquitto:mosquitto /var/lib/mosquitto
-
-# Entrypoint
-COPY docker/entrypoint-go.sh /entrypoint.sh
-RUN chmod +x /entrypoint.sh
-
-EXPOSE 80 443 1883
-
-VOLUME ["/app/data", "/data/caddy"]
-
-ENTRYPOINT ["/entrypoint.sh"]

Dockerfile.node

@@ -1,37 +0,0 @@
-FROM node:22-alpine
-
-RUN apk add --no-cache mosquitto mosquitto-clients supervisor caddy
-
-WORKDIR /app
-
-# Install Node dependencies
-COPY package.json package-lock.json ./
-RUN npm ci --production
-
-# Copy application
-COPY *.js config.example.json channel-rainbow.json ./
-COPY public/ ./public/
-
-# Bake git commit SHA (CI writes .git-commit before build; fallback to "unknown")
-COPY .git-commi[t] ./
-RUN if [ ! -f .git-commit ]; then echo "unknown" > .git-commit; fi
-
-# Supervisor + Mosquitto + Caddy config
-COPY docker/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
-COPY docker/mosquitto.conf /etc/mosquitto/mosquitto.conf
-COPY docker/Caddyfile /etc/caddy/Caddyfile
-
-# Create data directory for SQLite + Mosquitto persistence + Caddy certs
-RUN mkdir -p /app/data /var/lib/mosquitto /data/caddy && \
-    chown -R node:node /app/data && \
-    chown -R mosquitto:mosquitto /var/lib/mosquitto
-
-# Default config: copy example if no config mounted
-COPY docker/entrypoint.sh /entrypoint.sh
-RUN chmod +x /entrypoint.sh
-
-EXPOSE 80 443 1883
-
-VOLUME ["/app/data", "/data/caddy"]
-
-ENTRYPOINT ["/entrypoint.sh"]

Makefile

@@ -109,7 +109,7 @@ vet:
 	bash scripts/allmod.sh vet ./...
 
 fmt-check:
-	@unformatted=$$(gofmt -l $$(git ls-files '*.go' | grep -vi 'Dockerfile.go')); \
+	@unformatted=$$(gofmt -l $$(git ls-files '*.go')); \
 	if [ -n "$$unformatted" ]; then echo "gofmt required on:"; echo "$$unformatted"; exit 1; fi; \
 	echo "gofmt: clean"
 

docs/go-migration.md

@@ -1,4 +1,10 @@
-# Migrating from Node.js to Go Engine
+# Migrating from Node.js to Go Engine (Historical)
+
+> **Historical guide — July 2025.** These instructions describe the retired
+> Node.js-to-Go migration, including obsolete build recipes and Node.js rollback.
+> `Dockerfile.go` and `Dockerfile.node` have been removed. For current installation
+> and upgrades, follow [Deploy CoreScope](../DEPLOY.md); source builds use the
+> canonical [`Dockerfile`](../Dockerfile).
 
 Guide for existing CoreScope users switching from the Node.js Docker image to the Go version.