docs: reorder & testing

backend/Dockerfile

@@ -2,8 +2,8 @@
 
 # Build context is the workspace root (galaxy/), not the backend/
 # subdirectory, because the backend module pulls galaxy/{cronutil,error,
-# geoip,model,postgres,util} through the go.work replace directives.
-# Build with:
+# geoip,model,postgres,schema,transcoder,util} through the go.work
+# replace directives. Build with:
 #
 #     docker build -t galaxy/backend:integration -f backend/Dockerfile .
 
@@ -11,13 +11,15 @@ FROM golang:1.26.2-alpine AS builder
 WORKDIR /src
 ENV CGO_ENABLED=0 GOFLAGS=-trimpath
 
-COPY pkg/cronutil/ ./pkg/cronutil/
-COPY pkg/error/    ./pkg/error/
-COPY pkg/geoip/    ./pkg/geoip/
-COPY pkg/model/    ./pkg/model/
-COPY pkg/postgres/ ./pkg/postgres/
-COPY pkg/util/     ./pkg/util/
-COPY backend/      ./backend/
+COPY pkg/cronutil/   ./pkg/cronutil/
+COPY pkg/error/      ./pkg/error/
+COPY pkg/geoip/      ./pkg/geoip/
+COPY pkg/model/      ./pkg/model/
+COPY pkg/postgres/   ./pkg/postgres/
+COPY pkg/schema/     ./pkg/schema/
+COPY pkg/transcoder/ ./pkg/transcoder/
+COPY pkg/util/       ./pkg/util/
+COPY backend/        ./backend/
 
 # Synthesise a minimal go.work tailored to the backend binary so the
 # repository-level workspace (which lists every module) does not need
@@ -32,16 +34,20 @@ use (
 	./pkg/geoip
 	./pkg/model
 	./pkg/postgres
+	./pkg/schema
+	./pkg/transcoder
 	./pkg/util
 )
 
 replace (
-	galaxy/cronutil v0.0.0 => ./pkg/cronutil
-	galaxy/error v0.0.0    => ./pkg/error
-	galaxy/geoip v0.0.0    => ./pkg/geoip
-	galaxy/model v0.0.0    => ./pkg/model
-	galaxy/postgres v0.0.0 => ./pkg/postgres
-	galaxy/util v0.0.0     => ./pkg/util
+	galaxy/cronutil v0.0.0   => ./pkg/cronutil
+	galaxy/error v0.0.0      => ./pkg/error
+	galaxy/geoip v0.0.0      => ./pkg/geoip
+	galaxy/model v0.0.0      => ./pkg/model
+	galaxy/postgres v0.0.0   => ./pkg/postgres
+	galaxy/schema v0.0.0     => ./pkg/schema
+	galaxy/transcoder v0.0.0 => ./pkg/transcoder
+	galaxy/util v0.0.0       => ./pkg/util
 )
 EOF