Added color, README and Dockerfile

Dockerfile

@@ -0,0 +1,11 @@
+FROM gliderlabs/alpine:3.1
+
+MAINTAINER Knut Ahlers <knut@ahlers.me>
+
+RUN apk --update add wget && \
+    wget --no-check-certificate https://gobuilder.me/get/github.com/Luzifer/badge-gen/badge-gen_master_linux-386.zip && \
+    unzip badge-gen_master_linux-386.zip
+
+ENV PORT 3000
+EXPOSE 3000
+ENTRYPOINT ["/badge-gen/badge-gen"]

README.md

@@ -0,0 +1,30 @@
+# Luzifer / badge-gen
+
+Ever ran into this scenario? You wanted to add a link to something to your GitHub project using a nice button like the Godoc or the Travis-CI button but you was not able to find a button for this having the text you wanted? I did. I wanted to add a button "API Documentation" to one of my projects and did not find any button with that caption. So I wrote it myself.
+
+And I wasn't myself if I would allow me to do the same work twice or more often so I wrote a small webserver able to generate those buttons with a customizable text in SVG (I did not care about older browser since long ago)…
+
+## Usage
+
+### Using my version
+
+Simple use this URL:
+
+```
+http://badge.luzifer.io/v1/badge?title=API&text=Documentation&color=4c1
+```
+
+![YourTitle](http://badge.luzifer.io/v1/badge?title=API&text=Documentation&color=4c1)]
+
+Parameters `title` and `text` are free-text strings while `color` has to be 3- or 6-letter hex notation for colors like that one you use in CSS.
+
+To embed them into Markdown pages like this `README.md`:
+
+```
+![YourTitle](http://badge.luzifer.io/v1/badge?title=API&text=Documentation&color=4c1)]
+```
+
+### Using your own hosted version
+
+- There is a [Docker container](https://registry.hub.docker.com/u/luzifer/bage-gen/) for it. Just start it and use your own URL
+- You also can download the binary from [GoBuilder.me](https://gobuilder.me/github.com/Luzifer/badge-gen) and use that one

assets/badgeTemplate.tpl

@@ -9,7 +9,7 @@
    </mask>
    <g mask="url(#a)">
       <path fill="#555"    d="M0  0 h{{ .TitleWidth }}  v20 H0  z" />
-      <path fill="#4c1"    d="M{{ .TitleWidth }} 0 H{{ .Width }}  v20 H{{ .TitleWidth }} z" />
+      <path fill="#{{ .Color }}"    d="M{{ .TitleWidth }} 0 H{{ .Width }}  v20 H{{ .TitleWidth }} z" />
       <path fill="url(#b)" d="M0  0 h{{ .Width }} v20 H0  z" />
    </g>
    <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">

main.go

@@ -31,20 +31,25 @@ func main() {
 func generateBadge(res http.ResponseWriter, r *http.Request) {
 	title := r.URL.Query().Get("title")
 	text := r.URL.Query().Get("text")
+	color := r.URL.Query().Get("color")
 
 	if title == "" || text == "" {
 		http.Error(res, "You must specify parameters 'title' and 'text'.", http.StatusInternalServerError)
 		return
 	}
 
-	badge := createBadge(title, text)
+	if color == "" {
+		color = "4c1"
+	}
+
+	badge := createBadge(title, text, color)
 
 	res.Header().Add("Content-Type", "image/svg+xml")
 	res.Header().Add("Cache-Control", "public, max-age=31536000")
 	res.Write(badge)
 }
 
-func createBadge(title, text string) []byte {
+func createBadge(title, text, color string) []byte {
 	var buf bytes.Buffer
 	bufw := bufio.NewWriter(&buf)
 
@@ -63,6 +68,7 @@ func createBadge(title, text string) []byte {
 		"Text":        text,
 		"TitleAnchor": titleW/2 + xSpacing,
 		"TextAnchor":  titleW + textW/2 + 3*xSpacing,
+		"Color":       color,
 	})
 
 	bufw.Flush()