switching to exec pipeline

.drone.yml

@@ -1,21 +1,15 @@
 ---
 kind: pipeline
-type: docker
+type: exec
 name: default
 clone:
   depth: 1
 
-steps:
-
-- name: submodules
-  image: alpine/git
-  commands:
-  - git submodule update --recursive --remote
+platform:
+  os: linux
+  arch: amd64
 
-- name: coverage
-  image: ubuntu:20.04
+steps:
+- name: build
   commands:
-  - apt-get update && apt-get install -y \
-      build-essential cmake pkg-config libboost-all-dev \
-      libssl-dev libzmq3-dev libunbound-dev libsodium-dev libpgm-dev make git
-  - make coverage
+  - make -j4 release-static-linux-x86_64