Changes to Docker setup, installation example

.gitignore

 *.db
 .idea
+.env
+docker-compose.yml

Dockerfile

@@ -20,5 +20,6 @@ RUN chmod +x /opt/modlastfm
 FROM scratch
 
 COPY --from=builder /opt /opt
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 
 ENTRYPOINT ["/opt/modlastfm"]

README.md

 # stella-irc lastfm module
+
+## Installation
+
+### With Docker Compose
+
+Example docker-compose.yml:
+
+```
+version: "2"
+
+services:
+    modlastfm:
+        build: .
+        volumes:
+            - ./lastfm.db:/lastfm.db
+        environment:
+            - LASTFM_API_KEY="APIKEYHERE"
+            - LASTFM_API_SECRET="APISECRETHERE"
+        command: /opt/modlastfm
+```
\ No newline at end of file

internal/app/modlastfm/util/config.go

@@ -27,7 +27,11 @@ func NewConfig() *Config {
 	}
 
 	if c.APIKey == "" {
-		log.Fatal("A Last.FM API key is required")
+		log.Fatalf("A Last.FM API key is required (%s)", apiKeyKey)
+	}
+
+	if c.APISecret == "" {
+		log.Fatalf("A Last.FM API secret is required (%s)", apiSecretKey)
 	}
 
 	if c.DBPath == "" {