add: support a template.html file

Cargo.lock

@@ -631,6 +631,12 @@ version = "2.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
 
+[[package]]
+name = "memo-map"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38d1115007560874e373613744c6fba374c17688327a71c1476d1a5954cc857b"
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -647,6 +653,17 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "minijinja"
+version = "2.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12ea9ac0a51fb5112607099560fdf0f90366ab088a2a9e6e8ae176794e9806aa"
+dependencies = [
+ "memo-map",
+ "self_cell",
+ "serde",
+]
+
 [[package]]
 name = "multipart"
 version = "0.18.0"
@@ -841,7 +858,9 @@ dependencies = [
  "clap",
  "git2",
  "markdown",
+ "minijinja",
  "rouille",
+ "serde",
 ]
 
 [[package]]
@@ -899,6 +918,12 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef703b7cb59335eae2eb93ceb664c0eb7ea6bf567079d843e09420219668e072"
 
+[[package]]
+name = "self_cell"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16c2f82143577edb4921b71ede051dac62ca3c16084e918bf7b40c96ae10eb33"
+
 [[package]]
 name = "serde"
 version = "1.0.228"