Adding environment variable (config) retrieval interface/struct

Signed-off-by: Ethan Wellenreiter <ewellenreiter@gmail.com>

backend/internal/env/env.go

@@ -1,6 +1,6 @@
 package env
 
-type environment interface {
+type Environment interface {
 	Initialize(path string)
 	GetString(key string, defaultValue string) string
 	GetBool(key string, defaultValue bool) bool

backend/internal/env/environmentvars.go

@@ -0,0 +1,7 @@
+package env
+
+type EnvironmentVariables struct {
+	// nothing. just empty
+}
+
+// also add one for a file