rebased embedr (#3511)

* skeleton of embedr service, based on bskyweb

* embedr container setup

* builds on this branch

* actual routes

* fix embedr go:embed

* tweak embedr dockerfile

* progress on embedr

* fix path params

* tweaks to build process

* try to get embedr dockerfile to install embed deps

* build this branch

* updates to match sam's output HTML

* try to unbreak embedr dockerfile

* small embedr tweak

* docker hack

* get embed.js copied over to embedr

* don't x-frame-options for embed.bsky.app

* bskyembed: remove a console.log

* use html/template for golang snippet generation

* simplify embedr API fetches

* missing file

* Rm console.log fully

---------

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>

bskyweb/cmd/embedr/main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"os"
+
+	_ "github.com/joho/godotenv/autoload"
+
+	logging "github.com/ipfs/go-log"
+	"github.com/urfave/cli/v2"
+)
+
+var log = logging.Logger("embedr")
+
+func init() {
+	logging.SetAllLoggers(logging.LevelDebug)
+	//logging.SetAllLoggers(logging.LevelWarn)
+}
+
+func main() {
+	run(os.Args)
+}
+
+func run(args []string) {
+
+	app := cli.App{
+		Name:  "embedr",
+		Usage: "web server for embed.bsky.app post embeds",
+	}
+
+	app.Commands = []*cli.Command{
+		&cli.Command{
+			Name:   "serve",
+			Usage:  "run the server",
+			Action: serve,
+			Flags: []cli.Flag{
+				&cli.StringFlag{
+					Name:    "appview-host",
+					Usage:   "method, hostname, and port of PDS instance",
+					Value:   "https://public.api.bsky.app",
+					EnvVars: []string{"ATP_APPVIEW_HOST"},
+				},
+				&cli.StringFlag{
+					Name:     "http-address",
+					Usage:    "Specify the local IP/port to bind to",
+					Required: false,
+					Value:    ":8100",
+					EnvVars:  []string{"HTTP_ADDRESS"},
+				},
+				&cli.BoolFlag{
+					Name:     "debug",
+					Usage:    "Enable debug mode",
+					Value:    false,
+					Required: false,
+					EnvVars:  []string{"DEBUG"},
+				},
+			},
+		},
+	}
+	app.RunAndExitOnError()
+}