fix: correct dependencies and add Dockerfile

- Mark direct dependencies properly in go.mod (fsnotify, fpdf, goldmark)
- Remove duplicate Theme assignment in type_webserver.go
- Add Dockerfile for multi-stage build (was missing from repo)
- Update PLAN.md with completed tasks

Co-Authored-By: Claude (glm-5) <noreply@anthropic.com>

go.mod

@@ -3,13 +3,11 @@ module git.bjphoster.com/source/go-cv
 go 1.22.2
 
 require (
+	github.com/fsnotify/fsnotify v1.9.0
+	github.com/go-pdf/fpdf v0.9.0
 	github.com/gorilla/mux v1.8.1
+	github.com/yuin/goldmark v1.7.16
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-require (
-	github.com/fsnotify/fsnotify v1.9.0 // indirect
-	github.com/go-pdf/fpdf v0.9.0 // indirect
-	github.com/yuin/goldmark v1.7.16 // indirect
-	golang.org/x/sys v0.13.0 // indirect
-)
+require golang.org/x/sys v0.13.0 // indirect