make sure we can pull config from env variables.

.github/workflows/build.yaml

@@ -24,6 +24,7 @@ jobs:
     env:
       PROJECT_PATH: /go/src/github.com/analogj/scrutiny
       CGO_ENABLED: 1
+      SCRUTINY_WEB_INFLUXDB_HOST: influxdb
     steps:
       - name: Git
         run: |

webapp/backend/pkg/config/config.go

@@ -6,6 +6,7 @@ import (
 	"github.com/spf13/viper"
 	"log"
 	"os"
+	"strings"
 )
 
 // When initializing this class the following methods must be called:
@@ -64,6 +65,11 @@ func (c *configuration) Init() error {
 	//c.SetConfigName("drawbridge")
 	//c.AddConfigPath("$HOME/")
 
+	//configure env variable parsing.
+	c.SetEnvPrefix("SCRUTINY")
+	c.SetEnvKeyReplacer(strings.NewReplacer("-", "_", ".", "_"))
+	c.AutomaticEnv()
+
 	//CLI options will be added via the `Set()` function
 	return nil
 }