Added drone CI config

.drone.yml

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+---
+kind: pipeline
+type: ssh
+name: default
+
+clone:
+  depth: 10
+
+server:
+  host: 130.120.229.139
+  user: test
+  password:
+        from_secret: ssh_pass
+
+steps:
+- name: configure
+  pull: never
+  image: ubuntu/qp2_env
+  commands:
+  - ./configure -i all -c ./config/gfortran_debug.cfg
+  - source quantum_package.rc ; qp plugins download https://gitlab.com/scemama/qp_plugins_scemama
+  - source quantum_package.rc ; qp plugins install champ
+
+- name: compile
+  pull: never
+  image: ubuntu/qp2_env
+  commands:
+  - ninja
+
+- name: testing
+  pull: never
+  image: ubuntu/qp2_env
+  commands:
+  - qp test
+
+

drone/Docker/README.md

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+Docker files to build the containers used with DroneCI.
+
+Example:
+```
+docker build -t ubuntu/qp2_env .
+
+```
+

drone/Docker/Ubuntu/Dockerfile

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+ARG UBUNTU_VERSION=20.04
+FROM ubuntu:${UBUNTU_VERSION} AS builder
+
+# Timezone for tzdata
+ARG tz=Etc/UTC
+RUN echo $tz > /etc/timezone && rm -rf /etc/localtime
+
+# Install
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+ git \
+ curl \
+ wget \
+ python3 \
+ gfortran \
+ gcc \
+ g++ \
+ make \
+ build-essential \
+ rsync \
+ unzip \
+ libopenblas-dev \
+ pkg-config \
+ m4
+
+RUN ln -s /usr/bin/python3 /usr/bin/python
+
+