Add Clara _Manual

Clara-_Manual.md

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+## Prerequisites
+### Conda env 
+
+In order to run the code, you need to activate/ generate a conda environment. 
+
+#### Packages needed: 
+
+Install the conda env from the environment.yaml file in the repo. 
+
+
+#### Cristallina:
+/sf/cristallina/applications/mx/conda/miniconda/envs/39clara 
+
+## Installation
+
+1. Install the conda environment
+2. Clone the repository 
+
+## Usage 
+1. Login as gac-cristall service account on saresc-cons-05 (SLURM submission only works from here)
+
+2. Activate the conda env 
+
+```
+conda activate 39clara
+```
+3. change to the clara src dir
+
+```
+cd /sf/cristallina/applications/mx/clara/src
+```
+4. execute clara 
+
+```
+ ./clara.sh 
+```
+