Cleanups for Dockerization

Dockerfile

@@ -0,0 +1,6 @@
+FROM alpine
+EXPOSE 80
+RUN ["mkdir", "/data"]
+WORKDIR /data
+COPY track-me /app/
+ENTRYPOINT ["/app/track-me"]

indieauth.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"os"
 	"p83.nl/go/indieauth"
 )
 
@@ -120,7 +121,7 @@ func (h *IndieAuthHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			log.Println(authURL)
 
 			state := RandStringBytes(16)
-			redirectURI := fmt.Sprintf("%s/auth/callback", "http://localhost:8096")
+			redirectURI := fmt.Sprintf("%s/auth/callback", os.Getenv("TRACKME_HOST"))
 
 			sess.AuthorizationEndpoint = endpoints.AuthorizationEndpoint
 			sess.Me = meURL.String()

main.go

@@ -37,6 +37,5 @@ func main() {
 	http.Handle("/auth/", http.StripPrefix("/auth/", &IndieAuthHandler{}))
 	http.Handle("/", &indexHandler{DB: db})
 	http.Handle("/moment", &momentHandler{DB: db})
-	log.Fatal(http.ListenAndServe(":8096", nil))
+	log.Fatal(http.ListenAndServe(":8095", nil))
 }
-

util.go

@@ -2,10 +2,15 @@ package main
 
 import (
 	"math/rand"
+	"time"
 )
 
 const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
+func init() {
+	rand.Seed(time.Now().Unix())
+}
+
 func RandStringBytes(n int) string {
 	b := make([]byte, n)
 	for i := range b {