Update dependencies and fix gitignore

This commit updates various dependencies to their latest versions,
ensuring better compatibility and security. It also corrects the
`.gitignore` file to properly exclude the `target/` directory instead of
`server/target/`.

server/Cargo.toml

@@ -1,28 +1,28 @@
 [package]
 name = "doctate-server"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
 default-run = "doctate-server"
 
 [dependencies]
 axum = { version = "0.8", features = ["multipart"] }
-tokio = { version = "1", features = ["full"] }
-reqwest = { version = "0.12", default-features = false, features = ["json", "multipart", "rustls-tls"] }
+tokio.workspace = true
+reqwest.workspace = true
 tempfile = "3"
 askama = "0.12"
-tracing = "0.1"
+tracing.workspace = true
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 tracing-appender = "0.2"
 dotenvy = "0.15"
-uuid = { version = "1", features = ["v4", "serde"] }
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-toml = "0.8"
+uuid.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+toml.workspace = true
 tower-http = { version = "0.6", features = ["limit", "trace"] }
 rand = "0.8"
 bcrypt = "0.15"
 axum-extra = { version = "0.12", features = ["cookie", "form"] }
-time = { version = "0.3.47", features = ["local-offset", "parsing", "formatting", "macros"] }
+time.workspace = true
 toml_edit = "0.25.11"
 rpassword = "7.4.0"
 pulldown-cmark = { version = "0.13", default-features = false, features = ["html"] }