use env variables, containerfile

.containerignore

@@ -0,0 +1,7 @@
+.git
+.gitignore
+Dockerfile*
+Containerfile*
+README.md
+LICENSE
+*.yaml

Containerfile

@@ -0,0 +1,13 @@
+FROM golang:1.18 as builder
+WORKDIR /go/src/app
+COPY . .
+RUN apt update && apt upgrade -y
+RUN go build
+
+FROM alpine:latest as final
+WORKDIR /srv/
+RUN mkdir /srv/dota_patch_bot
+RUN mkdir /lib64 && ln -s /lib/libc.musl-x86_64.so.1 /lib64/ld-linux-x86-64.so.2
+COPY --from=builder /go/src/app/dota_patch_bot /srv/dota_patch_bot/
+
+CMD ["/srv/dota_patch_bot/dota_patch_bot"]

main.go

@@ -8,6 +8,7 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+	"os"
 	"time"
 )
 
@@ -105,6 +106,16 @@ func main() {
 	var currentPatch patch
 
 	flag.Parse()
+	if *hookPtr == "" {
+		if val, ok := os.LookupEnv("DOTA_WEBHOOK"); ok {
+			*hookPtr = val
+		}
+	}
+	if *sourcePtr == "" {
+		if val, ok := os.LookupEnv("DOTA_PATCH_SOURCE"); ok {
+			*sourcePtr = val
+		}
+	}
 	loadPatches(&patchlist, *sourcePtr)
 
 	if len(patchlist.Patches) <= 0 {