feat(landerctl): allow configuring CA bundle file

landerctl/include/landerctl.h

@@ -8,6 +8,7 @@
 typedef struct landerctl_cfg {
   const char *api_key;
   const char *server_url;
+  const char *ca_certs_bundle;
 } landerctl_cfg;
 
 typedef enum landerctl_cfg_err {

landerctl/src/cfg_parse.c

@@ -20,6 +20,7 @@ landerctl_cfg_err landerctl_cfg_parse(landerctl_cfg *out, const char *path) {
   } key_to_vars[] = {
       {"api_key", &out->api_key},
       {"server_url", &out->server_url},
+      {"ca_certs_bundle", &out->ca_certs_bundle},
   };
   size_t key_to_vars_len = sizeof(key_to_vars) / sizeof(key_to_vars[0]);
 

landerctl/src/main.c

@@ -123,6 +123,7 @@ int main(int argc, char **argv) {
   }
 
   curl_easy_setopt(ctx.curl, CURLOPT_HTTPHEADER, ctx.headers);
+  curl_easy_setopt(ctx.curl, CURLOPT_CAINFO, ctx.cfg.ca_certs_bundle);
 
   char curl_err_msg[CURL_ERROR_SIZE];
   curl_easy_setopt(ctx.curl, CURLOPT_ERRORBUFFER, curl_err_msg);