letsencrypt-sh 1st try.

app-crypt/letsencrypt-sh/files/config

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+########################################################
+# This is the main config file for letsencrypt.sh      #
+#                                                      #
+# This file is looked for in the following locations:  #
+# $SCRIPTDIR/config (next to this script)              #
+# /usr/local/etc/letsencrypt.sh/config                 #
+# /etc/letsencrypt.sh/config                           #
+# ${PWD}/config (in current working-directory)         #
+#                                                      #
+# Default values of this config are in comments        #
+########################################################
+
+# Path to certificate authority (default: https://acme-v01.api.letsencrypt.org/directory)
+#CA="https://acme-v01.api.letsencrypt.org/directory"
+#CA="https://acme-staging.api.letsencrypt.org/directory"
+
+# Path to license agreement (default: https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf)
+#LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
+
+# Which challenge should be used? Currently http-01 and dns-01 are supported
+#CHALLENGETYPE="http-01"
+
+# Path to a directory containing additional config files, allowing to override
+# the defaults found in the main configuration file. Additional config files
+# in this directory needs to be named with a '.sh' ending.
+# default: <unset>
+#CONFIG_D=
+
+# Base directory for account key, generated certificates and list of domains (default: $SCRIPTDIR -- uses config directory if undefined)
+#BASEDIR=$SCRIPTDIR
+
+# File containing the list of domains to request certificates for (default: $BASEDIR/domains.txt)
+#DOMAINS_TXT="${BASEDIR}/domains.txt"
+
+# Output directory for generated certificates
+#CERTDIR="${BASEDIR}/certs"
+CERTDIR="/etc/ssl/letsencrypt"
+
+# Directory for account keys and registration information
+#ACCOUNTDIR="${BASEDIR}/accounts"
+
+# Output directory for challenge-tokens to be served by webserver or deployed in HOOK (default: $BASEDIR/.acme-challenges)
+#WELLKNOWN="${BASEDIR}/.acme-challenges"
+WELLKNOWN=/var/www/letsencrypt
+
+# Default keysize for private keys (default: 4096)
+#KEYSIZE="4096"
+
+# Path to openssl config file (default: <unset> - tries to figure out system default)
+#OPENSSL_CNF=
+
+# Program or function called in certain situations
+#
+# After generating the challenge-response, or after failed challenge (in this case altname is empty)
+# Given arguments: clean_challenge|deploy_challenge altname token-filename token-content
+#
+# After successfully signing certificate
+# Given arguments: deploy_cert domain path/to/privkey.pem path/to/cert.pem path/to/fullchain.pem
+#
+# BASEDIR and WELLKNOWN variables are exported and can be used in an external program
+# default: <unset>
+#HOOK=
+
+# Chain clean_challenge|deploy_challenge arguments together into one hook call per certificate (default: no)
+#HOOK_CHAIN="no"
+
+# Minimum days before expiration to automatically renew certificate (default: 30)
+#RENEW_DAYS="30"
+
+# Regenerate private keys instead of just signing new certificates on renewal (default: yes)
+#PRIVATE_KEY_RENEW="yes"
+
+# Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
+#KEY_ALGO=rsa
+
+# E-mail to use during the registration (default: <unset>)
+#CONTACT_EMAIL=
+CONTACT_EMAIL=""
+
+# Lockfile location, to prevent concurrent access (default: $BASEDIR/lock)
+#LOCKFILE="${BASEDIR}/lock"
+
+# Option to add CSR-flag indicating OCSP stapling to be mandatory (default: no)
+#OCSP_MUST_STAPLE="no"
+

app-crypt/letsencrypt-sh/files/nginx.conf

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+location /.well-known/acme-challenge {
+    alias /var/www/letsencrypt;
+}
+