diff --git a/Taskfile.yml b/Taskfile.yml
index a83c843..38fa096 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -30,7 +30,7 @@ tasks:
   test:
     desc: Run test
     cmds:
-      - v test commands/
+      - v test .
 
   vet:
     desc: Report suspicious code constructs
@@ -41,8 +41,9 @@ tasks:
     desc: Format .v files
     cmds:
       - v fmt -w *.v
-      - v fmt -w commands/*.v
-      - v fmt -w template/*.v
+      - v fmt -w commands
+      - v fmt -w internal/template
+      - v fmt -w internal/config/
     
   clean:
     desc: Clean test files
@@ -61,6 +62,11 @@ tasks:
     cmds:
       - v . -o {{.TARGET}}
     
+  prod-build:
+    desc: Build vss for production
+    cmds:
+      - v -prod . -o {{.TARGET}}
+
   example:
     desc: Setup for example
     cmds:
diff --git a/commands/build.v b/commands/build.v
index 4e19c91..01f81b3 100644
--- a/commands/build.v
+++ b/commands/build.v
@@ -4,16 +4,13 @@ import os
 import cli
 import log
 import time
-import toml
 import regex
 import markdown
-import template
+import internal.template
+import internal.config
 
 const default_config = 'config.toml'
 
-// Allowed parameters
-const config_params = ['title', 'description', 'baseUrl']
-
 const default_template = 'layouts/index.html'
 
 const defautl_static = 'static'
@@ -43,19 +40,6 @@ fn read_file(filename string) ?string {
 	return contents
 }
 
-fn get_config_map() ?map[string]string {
-	mut config_map := map[string]string{}
-
-	// https://modules.vlang.io/toml.html
-	toml_str := read_file(commands.default_config)?
-	config := toml.parse_text(toml_str)?
-	for param in commands.config_params {
-		v := config.value_opt(param) or { continue }
-		config_map[param] = v.string()
-	}
-	return config_map
-}
-
 fn get_html_path(md_path string) string {
 	mut file_name := os.file_name(md_path)
 	file_name = file_name.replace('.md', '.html')
@@ -112,11 +96,19 @@ fn build(mut logger log.Log) ? {
 	}
 
 	template_content := os.read_file(commands.default_template)?
-	mut config_map := get_config_map()?
+
+	toml_text := read_file(commands.default_config)?
+	config := config.load(toml_text)?
+	mut config_map := config.as_map()
 
 	md_paths := normalise_paths(os.walk_ext('.', '.md'))
 	logger.info('start md to html')
 	for path in md_paths {
+		file_name := os.file_name(path)
+		if file_name in config.build.ignore_files {
+			logger.info('$file_name is included in ignore_files, skip build')
+			continue
+		}
 		mut md := os.read_file(path)?
 		md = pre_proc_md_to_html(md)?
 		contents := markdown.to_html(md)
diff --git a/commands/build_test.v b/commands/build_test.v
index f070b99..f7d253e 100644
--- a/commands/build_test.v
+++ b/commands/build_test.v
@@ -1,7 +1,5 @@
 module commands
 
-import os
-
 fn test_get_html_filename() {
 	test_path := 'index.md'
 	mut html_name := get_html_path(test_path)
diff --git a/example/README.md b/example/README.md
new file mode 100644
index 0000000..93fb8e7
--- /dev/null
+++ b/example/README.md
@@ -0,0 +1,3 @@
+# Example project
+
+This is vss example project.
diff --git a/example/config.toml b/example/config.toml
index 0048965..7cb55ce 100644
--- a/example/config.toml
+++ b/example/config.toml
@@ -1,6 +1,6 @@
 title = "Open Sea"
 description = "Takumi Tsuruta's home page"
-# baseUrl = 'https://zztkm.github.io/vss/'
+# base_url = 'https://zztkm.github.io/vss/'
 
 [build]
-ignoreFiles = ["ignore.md", "README.md"]
\ No newline at end of file
+ignore_files = ["ignore.md", "README.md"]
\ No newline at end of file
diff --git a/internal/config/config.v b/internal/config/config.v
new file mode 100644
index 0000000..7876f07
--- /dev/null
+++ b/internal/config/config.v
@@ -0,0 +1,40 @@
+module config
+
+import toml
+
+// template_params list of field names to convert as_map
+const template_params = ['title', 'description', 'base_url']
+
+// Build settings for build
+struct Build {
+pub mut:
+	ignore_files []string
+}
+
+// Config general settings for vss
+struct Config {
+pub mut:
+	build       Build
+	title       string
+	description string
+	base_url    string
+}
+
+// load
+pub fn load(toml_text string) ?Config {
+	doc := toml.parse_text(toml_text)?
+
+	mut config := doc.reflect<Config>()
+	config.build = doc.value('build').reflect<Build>()
+
+	return config
+}
+
+// as_map for template.parse
+pub fn (c Config) as_map() map[string]string {
+	mut mp := map[string]string{}
+	mp['title'] = c.title
+	mp['description'] = c.description
+	mp['base_url'] = c.base_url
+	return mp
+}
diff --git a/internal/config/config_test.v b/internal/config/config_test.v
new file mode 100644
index 0000000..968ce49
--- /dev/null
+++ b/internal/config/config_test.v
@@ -0,0 +1,22 @@
+module config
+
+const toml_text = '# for test
+title = "test site"
+description = "test page"
+base_url = "https://vss.github.io/vss/"
+
+[build]
+ignore_files = ["ignore.md", "README.md"]
+'
+
+fn test_load() {
+	config := load(config.toml_text) or {
+		eprintln(err)
+		return
+	}
+
+	assert config.title == 'test site'
+	assert config.description == 'test page'
+	assert config.base_url == 'https://vss.github.io/vss/'
+	assert config.build.ignore_files == ['ignore.md', 'README.md']
+}
diff --git a/template/template.v b/internal/template/template.v
similarity index 100%
rename from template/template.v
rename to internal/template/template.v