cache /_/info marshaled data; restructure dockerfile

Dockerfile

@@ -5,21 +5,21 @@ ARG TARGETOS
 ARG TARGETARCH
 
 WORKDIR /build
-COPY . .
 
 # fuck google
 RUN go env -w GOPROXY=direct
 
 RUN go install github.com/a-h/templ/cmd/templ@latest
-RUN templ generate
-
 RUN go install github.com/dlclark/regexp2cg@main
-RUN go generate ./lib/*
 
+COPY . .
+# usually soundcloakctl updates together with soundcloak, so we should redownload it
 RUN go install git.maid.zone/stuff/soundcloakctl@master
+RUN soundcloakctl js download
+
+RUN templ generate
+RUN go generate ./lib/*
 RUN soundcloakctl config codegen
-# this downloads JS modules (currently only hls.js) from jsdelivr and stores them locally for serving
-RUN soundcloakctl js download 
 
 RUN CGO_ENABLED=0 GOARCH=${TARGETARCH} GOOS=${TARGETOS} go build -ldflags "-s -w -extldflags '-static'" -o ./app
 RUN echo "soundcloak:x:5000:5000:Soundcloak user:/:/sbin/nologin" > /etc/minimal-passwd && \

main.go

@@ -340,16 +340,22 @@ func main() {
 			DefaultPreferences cfg.Preferences
 		}
 
+		inf, err := json.Marshal(info{
+			Commit:             cfg.Commit,
+			Repo:               cfg.Repo,
+			ProxyImages:        cfg.ProxyImages,
+			ProxyStreams:       cfg.ProxyStreams,
+			Restream:           cfg.Restream,
+			GetWebProfiles:     cfg.GetWebProfiles,
+			DefaultPreferences: cfg.DefaultPreferences,
+		})
+		if err != nil {
+			log.Fatalln("failed to marshal info: ", err)
+		}
+
 		app.Get("/_/info", func(c *fiber.Ctx) error {
-			return c.JSON(info{
+			c.Set("Content-Type", "application/json")
-				Commit:             cfg.Commit,
+			return c.Send(inf)
-				Repo:               cfg.Repo,
-				ProxyImages:        cfg.ProxyImages,
-				ProxyStreams:       cfg.ProxyStreams,
-				Restream:           cfg.Restream,
-				GetWebProfiles:     cfg.GetWebProfiles,
-				DefaultPreferences: cfg.DefaultPreferences,
-			})
 		})
 	}