feat(config): User must specify a directory to store data

Closes kemitix/git-next#55

src/server/config/mod.rs

@@ -17,6 +17,7 @@ use crate::filesystem::FileSystem;
 #[derive(Debug, PartialEq, Eq, Deserialize)]
 pub struct ServerConfig {
     webhook: Webhook,
+    storage: ServerStorage,
     forge: HashMap<String, ForgeConfig>,
 }
 impl ServerConfig {
@@ -56,6 +57,12 @@ impl AsRef<str> for WebhookUrl {
     }
 }
 
+/// The directory to store server data, such as cloned repos
+#[derive(Clone, Debug, PartialEq, Eq, Deserialize)]
+pub struct ServerStorage {
+    path: PathBuf,
+}
+
 /// Mapped from `.git-next.toml` file in target repo
 /// Is also derived from the optional parameters in `git-next-server.toml` at
 /// `forge.{forge}.repos.{repo}.(main|next|dev)`
@@ -394,6 +401,9 @@ mod tests {
             [webhook]
             url = "http://localhost:9909/webhook"
 
+            [storage]
+            path = "/opt/git-next/data"
+
             [forge.default]
             forge_type = "MockForge"
             hostname = "git.example.net"
@@ -418,6 +428,9 @@ mod tests {
             webhook: Webhook {
                 url: "http://localhost:9909/webhook".to_string(),
             },
+            storage: ServerStorage {
+                path: "/opt/git-next/data".into(),
+            },
             forge: HashMap::from([(
                 "default".to_string(),
                 ForgeConfig {